Back when I worked at a networking reseller, I recall arriving to the office at 9(ish) in Portugal and having the damnedest time trying to get my Spanish colleagues on the phone throughout the day - the combination of an hour's difference and the siesta (compounded by our own lunchtime, which is not as limited as, say, the British but definitely not as wide-reaching as the Spaniards') made it nearly impossible to get to them in the afternoons, and of course we left the office at 5(ish - more like 6)PM.

These days it's not so much of a problem (flexible working hours and e-mail have made async business communications a reality everywhere), but I think they get an (undeserved) bad rep by it from a business perspective, which is why I wouldn't mind seeing this go through.

I do have some reservations about whether it will be culturally acceptable, though, but the hints I got over the past few years suggested it would depend a lot on regional habits.